Sewing-machine shuttle.



No. 856,830. PATENTED JUNE 11, 1907. G. F. ZANZIG. SEWING MACHINE SHUTTLE.

APPLIOATION FILED MAE.19- 1906.

CHARLES F. ZANZIG, OF MILWVAUKEE, WISCONSIN.

SEWING-MACHINE SHUTTLE.

Specification of Letters Patent.

Patented June 11, 1907.

Application filed March 19.1906. Serial No- 306,775.

To (ti/1i whom it may concern:

Be it known that 1, CHARLES F. ZANZIG, a citizen of the United States, and a resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Sewing- Machine Shuttles; and I do hereby declare that the following is a full, clear, and exact description thereof.

The object of my invention is to provide simple and effective means for preventing sewing machine shuttles from skipping, due to wear of the bearing face of a shuttle, the consequence of which causes the shuttle to become loose in its seat, thereby resulting in imperfect alinement with relation to the machine needle, so that in the travel of said shuttle it fails to catch the thread delivered thereto by the needle, and thus causes the machine to skip stitches; said invention consisting in certain peculiarities of construction and combination of parts as fully set forth hereinafter with reference tothe accompanying drawings and subsequently claimed.

In the drawings: Figure 1 represents a face view of a shuttle holder, with shuttle and driving mechanism therefor, embodying the features of my invention, the view being partly broken away and in section as indicated by line 1-1 of Fig. 2; Fig. 2, a top view of the same with the shuttle holder in section as indicated by line 22 of Fig. 1, and portions of the driving mechanism broken away and in section to better illustrate the invention, and Fig. 3, a longitudinal sectional view thereof as indicated by line 33 of Fig. 1.

Referring by letter to the drawings, A indicates a shuttle holder or guide having fitted therein a shuttle B of the oscillating type, which shuttle is driven by a spanner C secured to a rock shaft D in the usual manner. The shuttle holder or guide is provided with an annular seat a, having a shouldered face b for the reception of a shuttle, a face a of which abuts the shouldered face I) of the holder, there being a fragmental ring (Z engaging the opposite face 0 of said shuttle for he ding the same'in its seat, the ring being held in osition on the holder A by dowels e and a 0 amp f secured to said holder by a screw 9 as shown. As indicated by the arrows {1; in Figs. 1 and 3, the needle enters the holder adjacent to the face 0 of the shuttle, the point h of which is adapted to engage the thread and form the loop, which in its forma tion passes over a segmental web E of said shuttle and is shed therefrom in the usual manner.

Continual oscillation of the shuttle causes wear of the faces 0 and c, and the lost motion due thereto results in a wabble of said shuttle, which frequently drops away from the line of the needle and fails to catch the thread delivered thereby. l/Vith this in view the rock-shaft D, which is in axial alinement with the shuttle, is centrally bored to form a pocket 1, into which is fitted a conical-headed plug 2, having a reduced shouldered stem 3, between the shoulder of which and the bottom of the pocket is interposed a spiral-spring 4, which spring tends to force the plug against the central portion of the shuttle web, and exert a continuous slight pressure thereon to hold said shuttle up to the working face I) of its seat.

By the above described arrangement it will be seen that the face a of the shuttle may wear off indefinitely without effecting the relation of point it thereof to the needle, the spring being always under sufficient tension to hold the shuttle intact, thus 'increasing the life of a shuttle, which in practice heretofore, had to be renewed frequently, thereby causing much less of time and expense. The tension exerted upon the segmental web of the shuttle by the conical head of plug 1, is such that it readily yields to permit passage of the thread between said head and shuttle without effecting the operation of the machine.

While I have shown and described my invention in connection with an oscillating shuttle, it is understood that the same is applicable to any form of shuttle wherein a spring-plug may be interposed between the shuttle and driving mechanism therefor, to produce the desired result.

I claim In a slmttle-mechanism having a shuttle guide, a rotary shuttle fitted in the guide, a segmental web extending from the body of the shuttle to a point concentric with the axis thereof, and a drive-shaft for the shut In testimony that I claim the foregoing I tle concentric with the same, the combinahave hereunto set my hand at Milwaukee in IO tion of a conical headed plug, said plug being the county of Milwaukee and State of Wisfitted into a recess in the end of the drivecousin in the presence of two witnesses.

5 shaft, and a spring interposed between the CHARLES F. ZANZIG.

plug and base of the recess, whereby said i Witnesses: plug impinges against the concentric web of GEO. WV. YOUNG,

the shuttle to hold the same against its guide. I FRED PALM. 

